tag:blogger.com,1999:blog-11787852.post7938966753435788001..comments2009-01-23T06:10:04.302-08:00Avi Abramshttp://www.blogger.com/profile/12550929795356812957abramsv@gmail.comBlogger7125tag:blogger.com,1999:blog-11787852.post-29198044862430844012009-01-23T06:10:00.000-08:002009-01-23T06:10:00.000-08:00Avi, your link in the first paragraph is a broken link. I love the photos I was able to see though. :PAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-11787852.post-8754989703142669742007-06-16T23:55:00.000-07:002007-06-16T23:55:00.000-07:00Contrails have nothing to do with vortices from the wing tips. They are formed from the water vapor in the engine exhaust. If it were from the wingtips, all planes would produce the same number of contrails. Coincidentally, it is always the same as the number of engines.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-11787852.post-331978389537194282007-06-12T01:42:00.000-07:002007-06-12T01:42:00.000-07:00great info, thanks!Avi Abramshttp://www.blogger.com/profile/12550929795356812957noreply@blogger.comtag:blogger.com,1999:blog-11787852.post-77224680671445300492007-06-12T01:39:00.000-07:002007-06-12T01:39:00.000-07:00Actually the disk shape and most of the other photos; these weird clouds occur when the aircraft is moving at transonic speed- these are from about Mach 0.8 to Mach 1.2, and I suspect that none of these aircraft are actually going faster than mach 1.0 in fact for practical reasons. (The shapes are caused where the *air* is *temporarily* forced to speed up past the aircraft to supersonic speeds, but since the aircraft is moving below the speed of sound, no sonic boom reaches the ground.)<BR/><BR/>Also the bit about the throttle is a bit misleading, it's the speed of the aircraft that determines where the disk forms (of course the pilot adjusts that using the throttle, but there's a lag since it takes time to accelerate...)<BR/><BR/>Hope this helps.Ian Woollardhttp://www.blogger.com/profile/01775652897782671639noreply@blogger.comtag:blogger.com,1999:blog-11787852.post-28249455980653679732007-06-06T10:36:00.000-07:002007-06-06T10:36:00.000-07:00Hey guys, thank you for correction! .. Sharp eye!Avi Abramshttp://www.blogger.com/profile/12550929795356812957noreply@blogger.comtag:blogger.com,1999:blog-11787852.post-57653610097456812842007-06-06T10:19:00.000-07:002007-06-06T10:19:00.000-07:00Hello.<BR/>First of all, your blog is very good.<BR/><BR/>It´s not a F-18 super hornet. It´s a F-14 (wacth the rest of the photos, the diference is noticeable), and there is an aditional reason for the vapor contrail: at certain altitude there are air zones of very low temperature (-X ºC), so the condensation is another reason.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-11787852.post-43684805096403462532007-06-02T01:40:00.000-07:002007-06-02T01:40:00.000-07:00"F/A-18F Super Hornet completes a super-sonic flyby:"<BR/><BR/>To me it seems to be the F-14?<BR/><BR/>At least definately no Super-Hornet.Anonymousnoreply@blogger.com